Upload speeds far below expected

I subscribe to Xfinity's 2 Gbps internet service in Baltimore, Maryland. My network equipment supports multi-gigabit throughput, including a DOCSIS 3.1 modem with a 2.5 GbE connection, a Unifi UDM7 router, and a wired 2.5 GbE client connection. Despite this, my measured download speeds consistently top out around 1.4 Gbps, and upload speeds are approximately 45 Mbps. I have already had a technician visit. During that visit, I was told that a measurement taken at the utility pole was approximately 60 Mbps.

I'm requesting help beyond routine in-home troubleshooting. Please investigate the condition and capacity of the outside coaxial cable, upstream and downstream performance, node or service-group congestion, and provisioning. Please also clarify what the reported 60 Mbps pole measurement actually represented and provide the results of the relevant line tests. If the service cannot achieve the speeds applicable to my plan, I would like some documentation.